Lathe-gearing.



R. K. LB BLOND & W. P. GROENE.

LATHE GEARING. APPLICATION FILED AUG. 27-, 1909.

' Patented Jan. 10,1911.

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R. K. LE BLOND & W. F. GROENE. LATHE GEARING. APPL IOATION IILED'AUG. 27, 1909.

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Patentd Jan. 10,1911

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RICHARD ir. LE 3m n) AND WILLIAM F. GROENE, or omcmmurr, omo, ssreuons r0 THE B. K. n LBLOND MACHINE :roor. co.,'or CINCINNATI, 01110, A CORPORATION LArriE-GEARING.

Specificationof Letters Patent. Patented J an. 10, 1911.

Application filed August 27, 1909. Serial No. 514,964.

To all whom it may concern:

Be it known that we, RICHARD K. Ln BLOND and lVILLlAM F. GRonNE, citizens of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Lathe-Gearing, of which the following is a full, clear and exact specification.

This invention relates to certain new and useful improvements in speed changing mechanism. I

The invention has for its object the production of improved mechanism whereby a,

number of different speeds may be imparted to a driven shaft from a driving shaft rotating at a constant speed.

A further object is to provide means for increasing the number of possible changes in the rate of rotation of the driven shaft with=respct to the constant speed of the power, without increasing the size of the head or housing.

A further object is to so arrange the speed changing mechanism and the controlling means therefor that in moving the handles in a given direction, the speeds always increase in a regular proportion, thus avoiding the peculiar jumps in speeds that occur in the mechanisms covered by the patents issued to us and upon which this is an improvement, said patents being numbered 845 005 and 857,562, and dated February 19, 190 and June 18, 1907, respectively.

The invention will be hereinafter fully setforth and particularly pointed out in the claims.

In the accompanying drawings :-Figure 1 is a horizontal sectional view illustrating our improved speed changing mechanism; Fig. 2 is a vertical sectional. view thereof. Fig. 3 is an end view; Figs. 4: and 5 are details; and Fig. (i is a view of the direct.

the driving shaft B.

longitudinal channel'lfiio receive a shifting blade Z), which is given longitudinal movement through engagement with a shifting.

collar B mounted on said shaft, said collar being shifted to give longitudinal movement to the blade by means of the yoke B and lever B.

Mounted to rotate on the sleeve B are two sister gear shells B and B carrying gears Z1 and 7), these shells being con jointly arched centrally to receive friction rings operated by dogs B seated in bosses If, in the sleeve B, and adapted to projected therefrom by the cam faces I)" to force the rings into engagement with the inner wall of one or the other of the gear shells, according as the shifting, blade .is moved in one direction or the other to lock one or the other of thegears b and b to the sleeve, and therefore to the shaft.

Meshing with the gear 6 is a gear d, and

meshing with gear I) is a gear d, said gears (Z and (Z being mounted upon a sleeve (Z running [loosely on the main or driven spindle D, whereby the operation of the clutching mechanism will deliver two distinct speeds to thissleeve gear. Immediately below the spindle D is an auxiliary or transmission shaft E carrying sliding gears e, c. By'means of a yoke e and lever 0 the gear. 6 may be thrown into mesh with the gear (Z, and gear c may be thrown into mesh with gear d, thereby imparting variations in the speed of shaft E, according to the trains of gears through which power is transmitted. Also mounted on the shaft E are sliding gears e an 0 which are driven by a long double feather e onsaid shaft. These gears e and e are arranged to mesh with gears F, F all keyed fast to the spindle D and are shifted by yoke e and le-' ver The gear F also on said main spindle meshes with a gear a", providtl with, a long hub or boss carried in'a bearing f, of the main head casting, said gear e ,being merely an idler that is meshed with the gear F at all times. The face ofgear 6 is provided with clutch teeth f arranged to be engaged by complemental teeth f -of pinion 6". When the ars e and e" are'sl id far enough on thesha; t E the clutch teeth are engaged to drive the gear e at the speed fell-aft E. so that by the movement of the -.Je'vcr three gear 6 1. plain view of the operator.

distinctive speeds are obtained on this movement, namely, from gear 6 to gear'E from to gear F, and from gear c to gear F.

'In osder to aidv the operator in making quick changes of speed and to accurately shift the levers c and 6 we have arranged the index plate G which is designed to be attached to the cover of the machine in In the middle columng of the plate are indicated twelve spindle speeds with which the head is provided; immediately to the left, at g, the position of the levers for each speed is shown. The position of the levers for getting'any definite speed can thus be determined at once by the operator without being obliged to carry a series of letters and numbers in his mind, while setting the handles. The index plate also gives, at 9 the proper work diameter for surface speed 40, 50, and 60 ft. a minute, from which the operator can determine at a glance the posi tion of the levers to obtain the correct surface speed for the work. In making selection the spindle speed can be entirely ignored, the operator merely selecting the surface speed required for his work, and opposite this can be seen at once the position of the levers.

ment of said levers. I

In operation it will be noted that the clutch-on shaft B will cause rotation of either gear I) or b, which in turn would give two speeds to each of the gears, (Z. fl, 4o meshmg with gears c, 0, whereby four speeds may be given to shaft E. In this connection it will be noted that the gear 6 is driven from shaft E so that four speeds areobt-ained for each of the gears e, e, and

making twelve speeds for the spindle D, the increase or decrease in speed, as the *ase may be, beinginade progressively, as per index G. The gears are so arranged that the movement of the levers c" and e increases or decreases the speed, the increase taking place by movement of both ,handles in the same direction. Moving the lever 0" to the right would increase the speed of shaft. I) as gear c would mesh with F.

Moving farther to the right would cause the drive to go from c to F, further increasing the speed. Moving lever c" to the right would increase the speed as the drive will be from (Z to 6, whereas in the extreme 50 left it goes from d to e.

Having thus fully described our invention,

' What we claim as new and desire to secure by Letters Patent of the United States, is 1. A speed changing gearing comprising a 55 driving shaft, selectable gearing mounted sets-of independent shiftable change speed gears mounted on said transmission shaft, a.

driven shaft, ears thereon, independent means for shiftmg each set of gears on the transmission shaft, said shifting means being movable in one direction to progressively increase the speed of the driven shaft and movable in the opposite direction to progressively decrease the speed of said driven shaft, an idler operatively connected with said driven shaft, .and means c'oiiperating with one of said sets of shiftable gears for operatively connecting said idler with said transmission shaft.

2. A speed changing mechanism comprising a driving shaft, selectable gears mounted thereon,a transmission shaft, a plurality of independentsets of shiftable-gears thereon,

a driven shaft, gears thereon, a pinion on said driven sha said pinion, means for shifting the gears on said transmission shaft, and means cooperating with one of said sets of shiftable ears for connecting said idler with said transmission shaft.

3. A speed changing mechanism comprising a driving shaft, selectable gears mounted thereon, a transmission shaft, a plurality of independent sets of shiftable gears thereon,

t, an idler meshing with a driven shaft, gears thereon, a pinion on said driven shaft, an idler, meshing with said pinion, independently of said sha ts, andmeans cooperating with one of said sets of shiftable gears for connecting said idler with said transmission shaft. U

4. A speed changing mechanism comprising a driving shaft, selectable gears mounted thereon, a transmission shaft, a plurality of independent sets of shlftable gears thereon,

a driven shaft, gears'thereon, a pinion .on

said driven shaft, an idler meshing with said pinion, saididler being provided with a hub, a sleeve in which said hub is mounted, and means cooperating with one of said set-s of shift-able gears for connecting said idler With said transmission shaft.

. A speedchanging mechanism c'ompris ing a driving shaft, selectable gears mounted thereon, a transmission shaft, a plurality of independent sets of shiftable gears thereon, a driven shaft, gears thereon, an, idler meshing with a pinion on said driven shaft I and supported independently of theti'ansmission shaft, means=for shifting the gears on the transmission shaft, and means for operatively connecting said idler and oneof the last mentioned ears. 6.- A speed changing mechanismcoinprismg a driving shaft, selectable gears mounted thereon, a transmission shaft, a plurality of independent sets of shiftable gears thereon, a driven shaft, gears thereon, an idler supported independently of said shafts and means for supfporting said idler 5 provided with clutch teeth-arranged to enmeshing wit-ha pinion on said driven shaft, names to this specification in the presence of said idler r sing provided with clutch teeth,- two witnesses. and means for shifting the ears on the RICHARD K. LE BLOND. transmission shaft, one of sai gears being WILLIAM F. GROENE.

Witnesses:

, FRANK S. PARKS, GRACE A. PUGH.

gage the clutch teeth of said idler.

In testimony whereof We have signed our 

